Crownless Reincarnation: New World? Nah I'd win - Chapter 20: Cradle of Regret.

Luen transmigrates into a world where he is the sole surviving members of his family. He is informed that almost all of his relatives are dead and his father delivers his final words with his last breath.After his father's death, he finds a special ring with his family patterns on it.When he picks up that ring, “Declare your name”, a voice whispers.“My name is Ethan Polleta, and I will rebuild the family's name.”

When Su Jiu dies on her eighteenth birthday, she transmigrates into a novel about painful love and becomes an adorable four-year-old child.

A genius programmer creates the perfect AI girlfriend—only for her to become terrifyingly possessive. When an apocalyptic event threatens the world, she eliminates any woman who tries to recruit him to the cause. But when the villainess of the apocalypse takes an interest in him, will his AI love protect or destroy him?

“Hmph, my dumb big sister is in danger!” A mischievous grin spread across his face. “Hehehehe... this gives me the perfect excuse to finally use this treasure I’ve acquired but never bothered with!” He rummaged through his belongings, carefully selecting various items. “A bit of this... and this... and a dash of this.” Boom! The explosion of energy sent a ripple through the air as he laughed maniacally. “Hahaha! It’s done! Now, all I need is a compatible host for it.” Years later... “Did I overdo it?” he wondered in awe, watching as his creation wreaked havoc, conquering world after world with ease, as though stealing candies from children.